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<a name="Information-provided-by-the-linker-1"></a>
<h4 class="subsubsection">2.17.3.1 Information provided by the linker</h4>
<p>Before the linker calls the <code>_bfd_final_link</code> entry point,
it sets up some data structures for the function to use.
</p>
<p>The <code>input_bfds</code> field of the <code>bfd_link_info</code> structure
will point to a list of all the input files included in the
link.  These files are linked through the <code>link.next</code> field
of the <code>bfd</code> structure.
</p>
<p>Each section in the output file will have a list of
<code>link_order</code> structures attached to the <code>map_head.link_order</code>
field (the <code>link_order</code> structure is defined in
<code>bfdlink.h</code>).  These structures describe how to create the
contents of the output section in terms of the contents of
various input sections, fill constants, and, eventually, other
types of information.  They also describe relocs that must be
created by the BFD backend, but do not correspond to any input
file; this is used to support -Ur, which builds constructors
while generating a relocatable object file.
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